fixed test.variancewd.js ESLint issue

Author: gkbishnoi07

lib/node_modules/@stdlib/stats/base/variancewd/test/test.variancewd.js

@@ -26,6 +26,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var Float64Array = require( '@stdlib/array/float64' );
 var variancewd = require( './../lib/variancewd.js' );
 
+
 // TESTS //
 
 tape( 'main export is a function', function test( t ) {